J. A. Dobrowolski, E. H. Hara, Brian T. Sullivan, and A. J. Waldorf, "High performance optical wavelength multiplexer–demultiplexer," Appl. Opt. 31, 3800-3806 (1992)
The principle of an optical wavelength multiplexer–demultiplexer is described in which the signals undergo repeated reflections from special filter elements that can be designed for a wide range of cross-talk ratios. The insertion losses of these units can be quite small and they can be implemented to provide simultaneous multichannel two-way transmission. In a preliminary investigation of an experimental prototype an insertion loss of 0.5 dB and a cross talk of −35 dB were demonstrated. The multiplexer–demultiplexer is expected to have a long life and high reliability.
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Theoretical Values of the CCT and IL’s for Signals of Different Wavelengths for a Multiplexer of the Type Shown in Fig. 2 with Different Combinations of Filters 1 and 2a
Filters
λ1
λ2
λ3
λ4
λ5
1
2
CT
IL
CT
IL
CT
IL
CT
IL
CT
IL
NBR
NBR
4.2×10−6 (−53.8)
3.0×10−2 (0.13)
3.1×10−6 (−55.1)
4.0×10−2 (0.18)
2.1×10−6 (−56.8)
5.0×10−2 (0.22)
1.0×10−6 (−59.9)
6.0×10−2 (0.27)
4.0×10−2 (−14.0)
4.0×10−2 (0.18)
NBR
LWP
4.2×10−6 (−53.8)
3.0×10−2 (0.13)
4.2×10−6 (−53.8)
4.0×10−2 (0.18)
4.2×10−6 (−53.8)
5.0×10−2 (0.22)
4.2×10−6 (−53.8)
6.0×10−2 (0.27)
4.0×10−2 (−14.0)
4.0×10−2 (0.18)
NBR
SWP
4.2×10−4 (−33.8)
3.0×10−2 (0.13)
4.0×10−4 (−34.0)
4.0×10−2 (0.18)
3.0×10−4 (−35.2)
5.0×10−2 (0.22)
2.0×10−4 (−36.9)
6.0×10−2 (0.27)
1.0×10−2 (−19.9)
4.0×10−2 (0.18)
LWP
NBR
4.2×10−4 (−33.8)
3.0×10−2 (0.13)
1.0×10−4 (−40.0)
4.0×10−2 (0.18)
1.0×10−4 (−39.9)
5.0×10−2 (0.22)
1.0×10−4 (−39.9)
6.0×10−2 (0.27)
1.0×10−2 (−19.8)
4.0×10−2 (0.18)
LWP
LWP
4.2×10−6 (−53.8)
3.0×10−2 (0.13)
1.0×10−1 (−9.9)
4.0×10−2 (0.18)
1.0×10−1 (−10.0)
5.0×10−2 (0.27)
1.0×10−1 (−10.0)
6.×10−2 (0.27)
1.0×10−2 (−19.9)
4.0×10−2 (0.18)
LWP
SWP
1.1×10−2 (−19.8)
4.0×10−2 (0.18)
2.0×10−4 (−37.0)
6.0×10−2 (0.27)
3.0×10−4 (−35.2)
5.0×10−2 (0.27)
4.2×10−4 (−33.8)
4.0×10−2 (0.18)
4.2×10−4 (−33.8)
3.0×10−2 (0.13)
NBR, narrow-band reflector; LWP, long-wavelength-pass filter; SWP, short-wavelength-pass filter. Reflection region: ρλ = 0.99, τλ = 0.01 Transmission region: ρλ = 0.01, τλ = 0.99. Three reflections are assumed; values in parentheses are in decibels.
Table II
Calculated and Experimentally Measured IL’s at λ1, = 632.8 nm and CT with λ2 = 687.0 nm for Two Different Types of Filter Combinationa
No. of reflections
LWP - SWP coatings
SWP - SWP coatings and 5 mm RG632 glass
IL calculated
IL measured
CT calculated
CT measured
IL calculated
IL measured
CT calculated
CT measured
1
2.0×10−2 (0.09)
2.0×10−2 (0.09)
9.9×10−1 (−0.04)
9.9×10−1 (−0.04)
2.0×10−2 (0.09)
2.0×10−2 (0.09)
2.0×10−2 (−17.0)
4.6×10−3 (−23.4)
3
4.0×10−2 (0.18)
1.1×10−1 (0.51)
2.0×10−2 (−17.0)
1.4×10−2 (−18.5)
6.0×10−2 (0.27)
5.0×10−2 (0.22)
8.0×10−6 (−51.0)
–
5
6.0×10−2 (0.27)
1.0×10−1 (0.46)
4.0×10−4 (−34.0)
3.0×10−4 (−35.2)
1.0×10−1 (0.46)
7.0×10−2 (0.32)
3.0×10−9 (−85.2)
–
7
8.0×10−2 (0.36)
9.0×10−2 (0.41)
8.0×10−6 (−51.0)
–
1.4×10−1 (0.66)
7.0×10−2 (0.32)
1.0×10−12 (−120.0)
–
9
1.0×10−1 (0.46)
1.0×10−1 (0.46)
1.6×10−7 (−68.0)
–
1.7×10−1 (0.81)
9.0×10−2 (0.41)
5.0×10−16 (−153.0)
–
LWP, long-wavelength-pass filter; SWP, short-wavelength-pass filter. Values in parentheses are in decibels.
Tables (2)
Table I
Theoretical Values of the CCT and IL’s for Signals of Different Wavelengths for a Multiplexer of the Type Shown in Fig. 2 with Different Combinations of Filters 1 and 2a
Filters
λ1
λ2
λ3
λ4
λ5
1
2
CT
IL
CT
IL
CT
IL
CT
IL
CT
IL
NBR
NBR
4.2×10−6 (−53.8)
3.0×10−2 (0.13)
3.1×10−6 (−55.1)
4.0×10−2 (0.18)
2.1×10−6 (−56.8)
5.0×10−2 (0.22)
1.0×10−6 (−59.9)
6.0×10−2 (0.27)
4.0×10−2 (−14.0)
4.0×10−2 (0.18)
NBR
LWP
4.2×10−6 (−53.8)
3.0×10−2 (0.13)
4.2×10−6 (−53.8)
4.0×10−2 (0.18)
4.2×10−6 (−53.8)
5.0×10−2 (0.22)
4.2×10−6 (−53.8)
6.0×10−2 (0.27)
4.0×10−2 (−14.0)
4.0×10−2 (0.18)
NBR
SWP
4.2×10−4 (−33.8)
3.0×10−2 (0.13)
4.0×10−4 (−34.0)
4.0×10−2 (0.18)
3.0×10−4 (−35.2)
5.0×10−2 (0.22)
2.0×10−4 (−36.9)
6.0×10−2 (0.27)
1.0×10−2 (−19.9)
4.0×10−2 (0.18)
LWP
NBR
4.2×10−4 (−33.8)
3.0×10−2 (0.13)
1.0×10−4 (−40.0)
4.0×10−2 (0.18)
1.0×10−4 (−39.9)
5.0×10−2 (0.22)
1.0×10−4 (−39.9)
6.0×10−2 (0.27)
1.0×10−2 (−19.8)
4.0×10−2 (0.18)
LWP
LWP
4.2×10−6 (−53.8)
3.0×10−2 (0.13)
1.0×10−1 (−9.9)
4.0×10−2 (0.18)
1.0×10−1 (−10.0)
5.0×10−2 (0.27)
1.0×10−1 (−10.0)
6.×10−2 (0.27)
1.0×10−2 (−19.9)
4.0×10−2 (0.18)
LWP
SWP
1.1×10−2 (−19.8)
4.0×10−2 (0.18)
2.0×10−4 (−37.0)
6.0×10−2 (0.27)
3.0×10−4 (−35.2)
5.0×10−2 (0.27)
4.2×10−4 (−33.8)
4.0×10−2 (0.18)
4.2×10−4 (−33.8)
3.0×10−2 (0.13)
NBR, narrow-band reflector; LWP, long-wavelength-pass filter; SWP, short-wavelength-pass filter. Reflection region: ρλ = 0.99, τλ = 0.01 Transmission region: ρλ = 0.01, τλ = 0.99. Three reflections are assumed; values in parentheses are in decibels.
Table II
Calculated and Experimentally Measured IL’s at λ1, = 632.8 nm and CT with λ2 = 687.0 nm for Two Different Types of Filter Combinationa
No. of reflections
LWP - SWP coatings
SWP - SWP coatings and 5 mm RG632 glass
IL calculated
IL measured
CT calculated
CT measured
IL calculated
IL measured
CT calculated
CT measured
1
2.0×10−2 (0.09)
2.0×10−2 (0.09)
9.9×10−1 (−0.04)
9.9×10−1 (−0.04)
2.0×10−2 (0.09)
2.0×10−2 (0.09)
2.0×10−2 (−17.0)
4.6×10−3 (−23.4)
3
4.0×10−2 (0.18)
1.1×10−1 (0.51)
2.0×10−2 (−17.0)
1.4×10−2 (−18.5)
6.0×10−2 (0.27)
5.0×10−2 (0.22)
8.0×10−6 (−51.0)
–
5
6.0×10−2 (0.27)
1.0×10−1 (0.46)
4.0×10−4 (−34.0)
3.0×10−4 (−35.2)
1.0×10−1 (0.46)
7.0×10−2 (0.32)
3.0×10−9 (−85.2)
–
7
8.0×10−2 (0.36)
9.0×10−2 (0.41)
8.0×10−6 (−51.0)
–
1.4×10−1 (0.66)
7.0×10−2 (0.32)
1.0×10−12 (−120.0)
–
9
1.0×10−1 (0.46)
1.0×10−1 (0.46)
1.6×10−7 (−68.0)
–
1.7×10−1 (0.81)
9.0×10−2 (0.41)
5.0×10−16 (−153.0)
–
LWP, long-wavelength-pass filter; SWP, short-wavelength-pass filter. Values in parentheses are in decibels.
Add to BibSonomy